Mr Dhanji said Mr Longworth had no criminal history and was significantly intoxicated at the time. The UBS banker told police after the attack that he never intended to hurt Mr Taiba.

His barrister sought to question a number of civilian witnesses at Longworth's committal hearing about the force of Longworth's punch and whether it rendered the security guard unconscious before his head hit the ground, arguing Mr Taiba was ''standing on a raised platform or step before falling''.

But Magistrate Carolyn Huntsman dismissed his application saying that their accounts were largely consistent and there was no need for them to give evidence at the October 3 hearing.

Mr Longworth was granted bail last year after his family offered to post more than $500,000 surety.